Copolymer having quaternary ammonium, n-alkoxyalkyl amido, and carboxy groups, optionally epoxy resin, and aqueous dispersions

Claim 1

A cationic cross-linkable thermosettable copolymer stable in aqueous emulsions prepared from a monomer system which comprises: a. 30-80 percent by weight of a non-functional alpha,beta-ethylenically unsaturated main monomer selected from the group consisting of styrene, alkyl styrenes, alkyl acrylates, methacrylates, vinyl ethers, vinyl acetates and substituted vinyl derivatives; b. 0.1 to 15 percent by weight of an alpha,beta-ethylenically unsaturated monomer containing carboxyl groups; c. up to 15 percent of acrylamide and N-alkyl substituted acrylamides; d. 1-15 percent by weight of an N-alkoxyalkylamido group containing alpha,beta-ethylenically unsaturated monomer; and e. up to 12 percent by weight of a cross-linkable epoxy resin modifier; and f. 1-15 percent by weight of an alpha,beta-ethylenically unsaturated monomer having the following general formula: CH.sub.2 = CR--Z--Y--NR'.sub.3 X wherein R is H or --CH 3 ; Z is --CO 2 ,--CONH--; Y is an alkylene group; R' is a monovalent alkyl group the three of which may be the same or different; and X is an anion; said alkyl group in said above described compounds being hydrocarbon radicals having 1-4 carbon atoms.